import { InputSection } from '@/types/content-types'
import { nicelog } from '@/utils/nicelog'
import { ApiModel } from '@microsoft/api-extractor-model'
import fs from 'fs'
import path from 'path'
import { CONTENT_DIR, getSlug } from '../utils'
import { getApiMarkdown } from './getApiMarkdown'

export async function createApiMarkdown() {
	const apiInputSection: InputSection = {
		id: 'gen' as string,
		title: 'API Reference',
		description: "Reference for the tldraw package's APIs (generated).",
		categories: [],
		sidebar_behavior: 'show-title',
	}

	const addedCategories = new Set<string>()

	const INPUT_DIR = path.join(process.cwd(), 'api')
	const OUTPUT_DIR = path.join(CONTENT_DIR, 'gen')

	if (fs.existsSync(OUTPUT_DIR)) {
		fs.rmSync(OUTPUT_DIR, { recursive: true })
	}

	fs.mkdirSync(OUTPUT_DIR)

	const model = new ApiModel()
	const packageModels = []

	// get all files in the INPUT_DIR
	const files = fs.readdirSync(INPUT_DIR)
	for (const file of files) {
		// get the file path
		const filePath = path.join(INPUT_DIR, file)

		// parse the file
		const apiModel = model.loadPackage(filePath)

		// add the parsed file to the packageModels array
		packageModels.push(apiModel)
	}

	await Promise.allSettled(
		packageModels.map(async (packageModel) => {
			const categoryName = packageModel.name.replace(`@tldraw/`, '')

			if (!addedCategories.has(categoryName)) {
				apiInputSection.categories!.push({
					id: categoryName,
					title: packageModel.name,
					description: '',
					groups: [
						'Namespace',
						'Class',
						'Function',
						'Variable',
						'Enum',
						'Interface',
						'TypeAlias',
					].map((title) => ({
						id: title,
						path: null,
					})),
				})
				addedCategories.add(categoryName)
			}

			const entrypoint = packageModel.entryPoints[0]

			for (let j = 0; j < entrypoint.members.length; j++) {
				const item = entrypoint.members[j]

				const result = await getApiMarkdown(categoryName, item, j)
				const outputFileName = `${getSlug(item)}.mdx`
				nicelog(`✎ ${outputFileName}`)
				fs.writeFileSync(path.join(OUTPUT_DIR, outputFileName), result.markdown)
			}
		})
	)

	// Add the API section to the sections.json file

	const sectionsJsonPath = path.join(CONTENT_DIR, 'sections.json')
	const sectionsJson = JSON.parse(fs.readFileSync(sectionsJsonPath, 'utf8')) as InputSection[]
	sectionsJson.splice(
		sectionsJson.findIndex((s) => s.id === 'gen'),
		1
	)
	sectionsJson.push(apiInputSection)
	fs.writeFileSync(sectionsJsonPath, JSON.stringify(sectionsJson, null, 2))
}
